(19)

(11)

EP 2 556 221 A2

(12)

(88) Date of publication A3: 22.12.2011 (43) Date of publication: 13.02.2013 Bulletin 2013/07 (21) Application number: 11719064.5 (22) Date of filing: 05.04.2011

(51) International Patent Classification (IPC):  F01L 1/344(2006.01) F16B 21/18(2006.01) (86) International application number: PCT/IB2011/000741 (87) International publication number: WO 2011/124971 (13.10.2011 Gazette 2011/41)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 07.04.2010 US 755992 (71) Applicant: Eaton Corporation Cleveland, OH 44114-2584 (US)	(72) Inventor: KELLER, Robert, D. Davisburg, Michigan 48350 (US) (74) Representative: Rüger, Barthelt & Abel  Webergasse 3 73728 Esslingen 73728 Esslingen (DE)